RE:some TAF (tough) questions ?

Hi, I've found answer to first question . I must use tnsnames (or ldap) for TAF

http://download-uk.oracle.com/docs/cd/B19306_01/network.102/b14212/namin g.htm#i498306

"Using Easy Connect Naming on the Client

Clients can connect to a database server using easy connect naming if the following conditions are met:

• Oracle Database 10g Net Services software installed on the client.
• Oracle TCP/IP protocol support on both the client and database server
• No features requiring a more advanced connect descriptor are required

For large or complex environments where advanced features, such as connection pooling
<http://download-uk.oracle.com/docs/cd/B19306_01/network.102/b14212/glos
sary.htm#i997500> , external procedure
<http://download-uk.oracle.com/docs/cd/B19306_01/network.102/b14212/glos
sary.htm#i434248> calls, or Heterogeneous Services
<http://download-uk.oracle.com/docs/cd/B19306_01/network.102/b14212/glos
sary.htm#i434257> , which require additional connect information, are desired, easy connect naming is not suitable. In these cases, another naming method is recommended."

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